Decorative base for a fishbowl



FIG. 1 is a front elevational view showing my new design;

FIG. 2 is a top and right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof, the left side elevational view being identical; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in FIG. 1 are for purposes of illustration only and do not form a part of the claimed design. 

The ornamental design for a decorative base for a fishbowl, as shown and described. 